.box {
  margin: 50px auto;
  width: 700px;
}
.content {
  display: flex;
}
.link-btn {
  display: block;
  width: 150px;
  border: 1px solid #ccc;
  line-height: 30px;
  margin-bottom: 10px;
  border-radius: 4px;
  padding: 0 10px;
}
.link-btn.atv {
  background: #ddd;
}
.right {
  margin-left: 20px;
}